Application and Innovation of Aluminum Foam

The experts of the Russian Light Alloy Research Institute have developed a kind of foamed aluminum alloy material. The consolidation degree of the data can be compared with that of the beech wood and foamed concrete, and its light weight can be compared with the wood board. The foamed aluminum alloy material is obtained by mixing an oxidized aluminum alloy powder with a substance separated during heating and gasification. Because the aluminum alloy contains extremely different alloys, the heating procedure is not the same, and the gasification powder obtained when the new data is composed is different, the resulting foamed aluminum alloy has a different density, and the foam pores are also very small. The foamed aluminum alloy material has certain sound insulation and insulation properties, is non-toxic and does not burn. The data can be sawed and milled, and screws can be screwed on to it. This new material, which is light, consolidating and not afraid of fire, can be used for the veneering of elevator doors, the laying of trains and subway trains.

Foam aluminum is made of pure aluminum or aluminum alloys, and is made of foaming technology. It has both metal and air bubble characteristics. It has small density, high absorption shock, high temperature resistance, strong fire resistance, corrosion resistance, noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtration capacity, easy processing, easy installation, high forming accuracy , Can be painted on the exterior.

Aluminum foam has excellent physical, chemical and mechanical properties as well as recyclability. These excellent functions of foamed aluminum make it a broad application prospect in today's data field, and it is very useful for the development of engineering materials, especially in the transportation industry, aerospace industry and building construction industry.

Lightweight: 0.1-0.4 times the density of metallic aluminum;

High specific stiffness: its flexural rigidity is 1.5 times that of steel;

High damping damping function and impact energy absorption rate: The damping function is 5-10 times that of metallic aluminum. When foam aluminum with a porosity of 84% undergoes a 50% variation, it absorbs energy of 2.5 MJ/M3C or more.

Outstanding acoustic function:

1, sound insulation function (closed hole): sound wave frequency between 800-4000HZ, closed-cell foam aluminum sound insulation coefficient of 0.9 or more.

2. Sound absorption function (micro-through hole and through hole): When the sound wave frequency is between 125---4000HZ, the sound absorption coefficient of through-hole aluminum foam can reach 0.8 at most, and the average absorption coefficient of octave exceeds 0.4.

Excellent electromagnetic shielding function: When the electromagnetic wave frequency is between 2.6-18 GHz, the electromagnetic shielding capacity of aluminum foam can reach 60-90dB.

Outstanding thermal function: The porosity of the closed-cell aluminum foam with a porosity of 80-90% is 0.3-1 W/m#8226;k, which is equivalent to marble. Through-hole aluminum foam has excellent heat dissipation under forced convection conditions because its pores communicate with each other.

Does not burn and has good heat resistance. â–¡ Corrosion resistance, good weather resistance, low moisture absorption, no aging, no toxicity.

Easily processed: easy to cut, drill, cement; can be bent into a desired shape after molding; can be treated with organic or inorganic paint; can be double-sided skin, constitute a large-scale light, high stiffness plate.

Easy installation: aluminum foam materials can be installed at a height without mechanical lifting equipment, such as ceilings, walls, roofs, etc., can be mechanically or directly connected and fixed with screws, and can also be bonded with adhesives. On the wall or ceiling.

The "sandwich" structure of the metal sheet-foamed aluminum-metal sheet inherits the excellent function of the foamed aluminum and has a high flexural strength, and can be used as a high-rigidity structural member for new building materials, locomotives, and the like.